Friction-clutch



( d l.) 2 SheetsSheet 1..

J. C. PCTTS.

FRICTION CLUTCH.

N0. 357,095. Patented Feb. 1, 1887.

W 1166565 9 W Y pizza/W 1 (No Model.) 2 Sheets-Sheet 2- .J. C. POTTS.

FRICTION CLUTCH.

N0. 357,095. Patented Feb. 1, 1887.

6y his 1251307724526 I UNITED STATES PATENT OFFICE.

JOSEPH C. POTTS, OF BERWYN, PENNSYLVANIA.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 357,095, dated February1, 1E 87.

Application filed June 14, 1586. Serial No. 205,043. (No model.)

i T at whom it may concern:

Be it known that I, JOSEPH O. Porrs, a citizen of the United States,residing in Berwyn, Chester county, Pennsylvania, have invented certainImprovements in Friction-Clutches, of which the following is aspecification.

One object of my invention is to effect the ready conversion of anordinary belt-pulley into a clutch-pulley, and a further object is to soconstruct the clutching devices that they can be conveniently applied tothe shaft and pulley without disturbing either.

In the accompanying drawings, Figure-1 is a longitudinal section showingthe clutching devices applied to the pulley and shaft; Fig. 2, atransverse section on the line 1 2, Fig. 1; Fig. 3, a transverse sectionon the line 3 4, Fig. l; and Figs. 4, 5, and 6, detached perspectiveviews on a reduced scale of different portions of the clutch. V

A is a rotary shaft, to which power may be applied, and on which is aloose pulley, 13, having the hub a, spokes b, and rim 1), of ordinaryconstruction.

Glamped to the spokes b, on opposite sides of the same, are twofriction-rings, c c, which in the present instance are held together andto the spokes by ordinary wood-screws. These rings, which .I prefer tomake of wood, are divided transversely, as shown in Fig. 2, in orderthat they may be easily applied to the spokes without disturbing thewheel or shaft.

Clamped to the shaft A, at one side of the wheel B, is a split hub,'D,Fig. 4., having a flange, (Z, which forms a clutch-ring andcarries afriction-ring, d, Fig. 1, also made in halves and secured to the flanged by screws. This friction-ring (1, when the pulley is not clutched tothe shaft, is just clear of the friction-ring c. In the present instancethe hub D is secured to the shaft A by clampingsetscrews 0, passingthrough ears 0 on the hub, as shown in Fig. 4.

On the shaft A, on the opposite side of the pulley B from the ring (1,is a split hub, E, secured by set-screws passing through ears on 'thehub in the same manner as the hub D. A clutch-ring, F, Figs. 3 and 5,also in two parts, held together by bolts f, is mounted on the hub E soas to be free to slide thereon, the joint between the halves of thisring having a dovetailed portion at 9 9, Fig. 3, so as to hold the twohalves of the ring together when adjusting it.to its place on thecollar. The

clutch-ring F is supplied with a friction ri ng,

k, secured by screws in the same manner as the ring d is secured to theclutch-ring d.

On the inner periphery of the ring F are two lugs, 71. h, which areadapted to grooves 73 in the hub E, Fig. 6, and which thus insure theturning of the ring F with the hub E, while allowing it to have anindependent sliding movement toward and from the pulley B.

Levers Itwo in the present instance--are pivoted at] to lugs Z on thehub E. One arm, or, of each lever acts as a cam, which bears against theouter face of the ring F, and is guided in radial grooves m therein. Theother arm of each lever is connected to a sliding collar, M, by links J,Fig. 1, the links being pivoted to the collar at n and to the levers atn, thus forming a double knee-joint. The

collar M is grooved at p for the reception of the cams of the levers Iin the direction of their arrows. These cams press against theclutch-ring F, and force the friction-ring is against the friction-ringc of the pulley. A continued movement of the sleeve M causes the pulleyB to move longitudinally on the shaft, and thus bring the friction-ring0 of the pulley into contact with the friction-ring d on the clutch-ringd. The pulley is thus firmly clamped between the two clutch -rings andcaused to rotate therewith. By moving the collar M in the oppositedirection the clutchring F will free itself from the pulley B, and inturn the pulley will be freed from the clutchring (2. I

The frictional surfaces may be extended to the rim of the pulley; butthis will depend on the power required. The ring F may slide on theshaft instead of on the hub E; but I prefer the clutch-rings withoutdeparting from my invention, and other devices than the levers I andlinks J may be used; but they are the best adapted for the purpose.

I am aware that a pulley has been provided with a ring on the inner sideof the rim for being clutched between clamping-rings, and also that apulley or drum has had its opposite ends provided with friction platesor disks to be clamped between a fixed and a movable disk on the shaft;hence I do not broadly claim such combination, my invention having forits main object the conversion of an ordinary beltpulley into aclutch-pulley, which is effected by applying the clutching-rings to theweb or spokes of the pulley between the hub and rim, and a furtherfeature of the invention being the dividing of all of the clutchingdevices transversely, so that they can be conveniently applied to ashaft and pulley already in position without disturbing said pulley orshaft.

I therefore claim as my invention- 1. The combination of the pulley,having hub, spokes, and rim, with clutching-rings occupying positions onopposite sides of the spokes of the pulley, between the hub and rim, andconfined to and carried by said spokes, all substantially as specified.

2. The combination of the shaft and the pulley loose thereon withopposite frictionrings, a fixed clutch-ring, and alongitudinally-movable clutch-ring, all of said rings being dividedtransversely, whereby they can be applied to the shaft and pulleywithout disturbing either of the latter, all substantially as specified.

3. The combination of the shaft, the loose pulley having oppositefriction-rings, the fixed clutch-ring on one side of the pulley, amovable clntch-ring having internally-projecting lugs, and a hub securedto the shaft and having longitudinal grooves for the reception of saidlugs, all substantially as specified.

4. The combination of the grooved hub secured to the shaft,clutch-levers hung thereto, and a movable clutch-ring having radialgrooves for the reception of the clutch-levers and internal lugs adaptedto the grooves of the hub, all substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOS. C. POTTS.

Witnesses:

HENRY HowsoN, \VILLIAM D. CONNER.

